Acuum evaporating apparatus.



PATBNTED MAR. 21, 1905.

I. SUZUKI, VACUUM EVAPORATING APPARATUS.

APPLIOATION I'll-ED OUT. 17, 1904.

3 SHEETS-SHEET l. v

axmkikk PATENTED MAR. 21, 1905.

x T. SUZUKI. VACUUM EVAPORATING APPARATUS.

APPLICATION FILED 0013.17. 1904:.

a SHEETSSHEET 3.

v mm WM the process of expansion is passed through a NITED TATES Patented March 21, 190

Arena Urr cn.

ACUUM EVAPORATING APPARATUS.

SPECIFICATION forming part of Letters Patent No. 785,238, dated March 2]., 1905. Application filed October 17, 1904. Sleriiil No. 228.772.

1"!) all whom it may concern:

Be it known that I, TOZABURO SUZUKI, a subject of the Emperor of Japan, residing at No. 401 Jibeishinden, Sunamura, in the countyof hIinami-Katsushika, in the Province of Tokio,

Japan, have invented certain new and useful Improvements in Vacuum EvaporatingApparatus, of which the following is a specification.

My invention relates to piled vacuum evaporating appaiatus wherein a plurality-of distinct evaporating chambers or pans connected in series cooperate with each other in the operation of evaporating liquid.

My invention relates more particularly to evaporating apparatus wherein liquid during series of evaporating chambers or pans, one of the series, preferably plied with a heat agency from an initial source, while the remaining chambers utilize discharged vapor of companion chambers as a heat agency to effect further expansion of the liquid in succeeding chambers. My invention is an improvement upon apparatus covered by Letters Patent No. 7 64,393, issued to me July 5, 1904, wherein the evaporating-pans are shown as separate and distinct structures. I am enabled to effect substantial improvements in my improved device over the patented device by combining the distinct pans in a single composite structure. One of said improvements consists in provid ing aplu'rality of evaporating-coils and in the arrangement of saidhe'ating-coils-in layers and desirably in staggered relation with each other, thereby materially increasing theevapcrating efiiciency of each chambers A- -further improvement consists in utilizing the gravity fl'ow of liquid from one chamber to the other to effect rotation of distributingdisks, therebyavoiding the employment of auxiliary mechanical appliances and power heretofore necessary.

My invention possesses otherimportant advantages, which will be more fully described by reference to the accompanying drawings and will be more particularly pointed out in the appended claims. 1

Inthe drawings, Figure 1 1s a view in elevation of a device embodying the mam teathe first, being sup-' tures of my invention. Fig. 2 is a vertical section on line2 2 of Fig. 1. zontal section on line 3 3 of Fig. 2. Fig: 4 is a horizontal section on line 4 4 of Fig. 2.

Like characters of reference designate similar parts throughoutthe different figures of the drawings.

The device hereih shown comprises a series oftwo distinct evaporating-chambers 1 and 2, embodied in a single composite structure 3. Each of the chambers 1 and,2 is a complete and distinct section of the structure 3, which latter may be expanded or contracted in size by the addition or subtraction of one or more sectional chambers. Thus an apparatus of the desired capacity may be supplied without the necessitypf designing and building a special structure. The advantages of this feaor base portion 4 and the u I per or hood por- Fig. 3 is a horition 5 separate from the chambers land 2.

The points of juncture of the several sections are provided with annular attaching-flanges 6, 7, 8, and 9, whereby the evaporating-chambers may be joined in a hermetically-sealed structure. A thermometer 10 is desirably provided to determine the temperature of the chambers l and 2and a gage 11 to determine the degree of vacuity attained in said chamhers. Windows 12 are provided to enable the operator to inspect the interior of the chamhere. An air-cock 1 3 for admitting air to the chambers 1 and 2 is provided, as shown, upon the chamber 1, the base 5 being equippedwith'a level-gage 14 to enable the operator to ,determine the amount of liquid which has settled in said base and, 'draWv a portion of the same for purposes of examination. An air-exhaust pipe 15, leading' fromthe chamber 2 to an airpump (not shown) and having a valve 15, is provided,.

whereby a vacuum in the chambers l and 2 may be produced previous to starting the evaporating operation.

Each of the chambers 1 and 2comprises an if necessary, to withannular wall 16,.open at one end and closed at the other end by an integral base-Wall 17, which preferably constitute receivingpans for the said chambers. Vertically projectii or bearings are separably united to the walls l? too , and extend upwardly 'incident with'the axes of said chambers.

-. nut 20, having a projecting stud 3i equipped i Saidwalls 17 are provided with eentrally-disl nular flange the distributingdisl;

vided for said pipe.

35 in the pipe 35 may be opened 1 erably cooperates with the threads oi? said latter attains the tothepipes of adj acentlaycra;

with exterior threads, is provided and prettubes 18 to clamp the latter upon the walls 17.

posed apertures to permit the passage thercthrough. of the studs 21 and their insertion i into the base of the tubes 18, as will be clearly seen by reference to Fig. 2. Said studs 21 i form seats or lower bearings for rotative shafts l 22, which pass through and operate in upper bearings 23, separably united with the tubes l 18. A lower hearing A is provided and, as

shown, is removably secure in the studs 21,

l which are provided with antifriction mechanl v I l ism 25. Said shaft 22 carries upon its upper end a rotative distr buting-disk ing an open chamber formed by a lower wal I l 27, a vertical wall 28, and an overhanging wah Q9. Said disk is desirably mounted on thc i shaft 22 by means of a seat -lO having an an- 31. upon which the said disk is directly seated. A series of apertures 32, having projecting flanges, are formed in the lower wall 27 of said disk 26, causing the liquid therein to attain some depth, so that a uniform over flow upon the heating-pipes below will be effected. Said disk is also provided with impactblades 33, which, as herein shown, extend between the lower overhanging and vertical walls 27, 2-8, and 29. A supply of liquid to the disl; 26 may beeflected by means of a pipe 35, having a valve which pipe enters said chamber 1 I and carries upon its inner end a nozzle 36, the

latter being positioned in a manner to direct liquid passing thereth rough against the blades 1 3 supply pipe therei partme'nt 314:, causing steam to flow l the pipes 37 and 33, thereby utilizing. the force thus imparte to rotate the distributing-disk when itis desirable toeflect such rotation. Liquid may also besupplied to said disk 26 by a pipe 3a, which enterstheehaznher 1 and projects in a suff cient distance to Earry the liquid to by reference to tus the valve sufficiently to start the disk 26, and when the desired s'peeda further'sup- I if neededgmay be secured in the. pipe 3 1. Nhen ply of liquid, openingthe valve 3d the liquid overfl the distributing-disk 26, it falls upon an area of heat-surface desirably of the,.following-cons'truct-ion: A'- plurality of. pipes 37, preferably arranged concentrically around said shaft -22,; is provided, said pipes being-grouped in layers spaced -apart from each other,.the pipes of one:

layerbeing in staggered relation with respect 'S'aid pipes pref- 26, comprisg l l l l by l 1 ed by simply regulating the draining 26, as will beelearly seen i partmenteio to an A valve 34" is no i L6 is provid (we the flanged apertures of and characters of reference are'applied'.

erably occupy the space intervening the distributing lislrs 26 and the bottom walls 17 of each chamber. The staggered relation of the diiierentlayers of pipes serves effectively to receive the liquid it falls from the distributingdislts 26. The said liquid in failing to contact with pipes oi the lirst layer is caught by the pipes of a succeeding or lower layer, which are out oi vertical alincment with ad jacent layers of pipes. The provision of a plurality of pipes avoids the necessity of providing numerous receiving-pans for the unevaporated liquid. This construction is also effective when it is desired that the liquid should accumulate in the chambers. A greater or contact area between the liquid and pipes 37 may be eifectoi chem here 1 and 2. I desirabl mount the pipes 37 in a manner to permit their removal from the chamber by an operation both simple and effective. To this end a lateral hollow extension 40 is formed upon each of the cl'iambcrs 1 and 2-, having a passage oi sufiicient dimensions to permit the bodily insertion and with drawal of the pipes 37 when access to the same or to the interior of the chamber is desired. Previous to withdrawing the pipes 37 it necessary to remove the centrally-dis posed bearings 18 from the chamber to which access is desired. In order that the pipes 37 may be more easily handled in the operation of removing the same from the chambers, I desirably provide amounting to which both ends of each pipe of the d-ifierent layers are rigidly attached. Said mounting preferably consists of a hollow chamber 41, divided into ingress'and egress compartments, to the inner walls =22 of whichthe ends of the pipes 37 are attached. A dividing-wall i3 is preferably located in a manner to cause all of the ingress pipe ends to communicate with the ingresscompartment 4e and all of the egress ends ,to communicate with the egress-compartment '15.. Said mounting is desirably bolted to proiect-. ing flanges on the extension &0. A steam- 16 communicates with the'conithrough pass therefrom through outlet-pipes? Said pipe ed with a steam-gage 1 valvcdtl. A valve 43"" 's also provided for the outlet-pipe 47.

The construction'ot the second chamber 2 is desirably similar in all respectschamber 1, hereinbefore described, and like 19, which supply distributingdisl; 26 of chamber 2', are sinu spects to supply-pipes 34 and35ofchamber-1, except that instead of" extendinghutwardly liqui to the er in all re:

to that of Pipes is through the wall lfiof chamberfl theycom 'municate withchamherl and drain therefrom' the liquid retalned'by the base-wall 17. Said,

pipes s8 and 49 are controlled by operating The chamber; i provided,-af s hamberlywith a removable mounting ll tents of chamber .1 is then conveyed to chamfor"pipesi3' 7, comprising a divided chamber her 2 by means of pipes L8 and 49, controlled i 1 aving'Taningress-compartment 44,communiby valves and 51, which pipes operate 1n a eatiug 'ingressends'ofsaid pipes 37, like manner. to pipes 34 and 35. Circulation i v1andanegi-esscoinpartriient l5, communicating of the vapor through the heating-coils of withtheegress ends of said pipes." The inchamber 2 is maintained byan air-pump and- "Egress-compartment communicates, bylmeanscondenser (not shown) connected with the outof a p'i'p'e" 56, with 'the hood5 to conveythe let-pipe 47 Thus any condensation of the vavapordischargedfro'michamber}tothe evapp or first admitted is prevented from'forming "'oratingl-pip'sfl37 of chamberQ. An outleta trap and impeding the passage of said va- ""pe53',having;a valvesa. leads from 'the'com-. por. The liquid remaining in the lower porpartin'e i'it 'fi'of-chamber 2 to a suitable contion of chamberQ may be drawn off by valve denserand pump,- ,(Illotshowm) '55 into the base 4, whereapipe 58, havinga hiilel'theoperation of the apparatus may valve 54*,S6I'YQ to further conveythe re- Qbe-j'obvious from the foregoing, a brief recamaining liquid to any suitable destination propitiilation mayfa'cilitate acl'eare'r understandvided. i

mg thereof? 7 1 i The operation of the device of my present :In starting the apparatus the confined air is invention does not differ materially from the withdrawn through the pipe 15, which leads device pf my previous invention covered by 2 to an'air-puinp. (Not shown.) -.Valves 50 and. Letters Patent hereinbefore identified, and

; 51 0f the pipes .48 and 49 are' opened to esthe improvements secured by said patented h communication between the chambers apparatus are also present in the device de- -1;--ahd :2. Valve 46 of the steam-supply pipe scribed by the foregoing, together with ad- :is closed; so, also, are valves 34*and 35 of the ditional improvements already fully set forth.

2 5 liquid+supply pipes 34 and 35 to chamber 1. It \vill'be obvious'that changes may be made 9 1Yalve 54, leadingfrom the base portion 4, is in the construction herein shown without defclosed, while valve 55, controlling communiparting from the spirit of my invention.

{cation between said base portion 4 and the. Therefore what I claim, and desire to sechamber 2, is opened. It will beseen that all cureby Letters Patent, isfi go parts of the apparatus from which air is to 1'. The combination, in a composite evapobe withdrawn are now in communication with rating apparatus including a series of evapo- "each other and the 'pipe 15. The gage 11 is rating-chambers, ,perforated distributingalso in general communication with the sysdisks for saidchambers, and means whereby I tem, and" the same is relied upon to indicate liquid may be supplied to said disks to eflect the degree of vacuity prodhcedtherein. Asrotation thereof. Io o ""suming that thedesiredvacuum has been'pro- 2. The combination, in a composite evapo duced, the valve 15" is 'l'c lose'd. Steam-pasrating apparatus including a series of evaposage through the e aporatingpipes 37 in rating-chambers; perforated distributing- "-,.chamber 1 is effect (1 by opening the inletdisks therefor having impact-blades, and liq- 40 valve 46and outlet-'valvei'i. It will be unuid-supply nozzles adapted to direct liquid 05 derstood that air mayrbe exhausted from the against said blades thereby eifecting rotation steam coil 37 through the medium of an airof said disks V pump (n ot shown) connected with the outlet- 3. The combination, in a composite evapo-' I pipe 47. After the steamin-the pipes 37 has rating apparatus including a series of evapo- 4 5 produced the required temperature in the ratingchambers, perforated distributing- 1 0 chamber 1, as indicated by the thermometer disks having impact-surfaces, and a liquid- 10, valve 35 is opened to convey liquid to supply nozzle adapted to direct liquid against the distributing-disk 26 by means of pipe 35 said surfaces thereby effecting rotation of said and the nozzle 36. As before stated; the imdisks;

5o pact of the liquid against the blades 33 effects 4. The combination, in a composite evapo- I 5 rotation/of the disk 26,- serving to distribute rating apparatus including a series of evapouniformly the overflow through the apertures rating-chambers having rotary shafts, perfo- 32 upon the steam-coil or evaporating-pipes rated distributing-disks separably mounted on 37. The contact of the liquid with the pipes said shafts,.said disks having impact-blades,

,355 37 and its subjection to the high temperature and a liquid-supplynozzle adapted to direct of the chamber 1 produces expansion in the liquid against said blades thereby effecting roform ofvapor, which rises from the chamber tation of said disks. 1 to the hood 5 and passes into the pipe 56, 5. The combination, in a composite evapowhereby it is conveyed to the ingress-comrating apparatus comprising a series of evapo- 60 partment 44 of the chamber 2. The vapor as rating-chambers,operative distributing means I 5 discharged from chamber 1,,in passingthrough therefor, and'mechanism whereby liquid supthe coils 37 of chamber 2 is utilized therein plied to said distributing means serves/to efas a heat agency to effect distillation of liquid fect operation thereof. fromchamber 1 which has not been expanded 6. The combination, in an evaporating ap- 5 by its passage therethrough. The liquidconparatus, of evaporating-chambers, distribut- 3 ,"ing disks for said chambers, and means i tary shafts, distributing-disks jspa'rabiy whereby iiquid may be supplied to said disks mounted g q sai'ci shafts, said disks having im- ,to efiect rotationwtherexifr'law.m "ptifl bfifleaand a liquid-supply nozzle adapt- 2 7. The combination in an, evaporating zip ed to direct liquid against said blades thereby paratus, ofevperating-ehambers. distribubi effecting rbfiation of saiddisks. v i ing-disks therefor, havingimpacbblades, and x 10. The combination, in an evaperabing ap I a liquid-supply nqzzle adapted to dir'e'ctliquid paratus. of emporabingahambers,' operative against said biad'estherehy effecbing rot at idn distributing means therefor; and mechanieni 5 of said disks. f i r hereby seid 'liquid supplied to said cii's'izribxiise 8. The combination, in an evaporating a9: inf gw serves to efi'ect; operation lihereofi: paratus, of evaporating-chambers, dist!" '7: ,lnmsitimonywhereef Izzifix my i ing-d1iskshain%jmpat-sig'face? and; iiquid presume of awe witnesses; I supp y nozz e a apte to irecn iqui against 2 H i r -f 'said surfaces thereby efiect'mg rotation of sei d UAUK?" disks. V Y 1 9. The combination, in an evapqr ibing' ap- Witnessesr 1 R. S. MIL n;

- paratus, of evaporatingehamhers having r0- 1 I JSIHWARA. 

